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Pull request: 4698 Gateway IP in DHCP Lease

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Closes #4698.

Squashed commit of the following:

commit 6be0caee58926f8cea1e10650fbde0c8d97d0dac
Author: Ildar Kamalov <ik@adguard.com>
Date:   Fri Jul 8 13:41:50 2022 +0300

    update translation

commit e0370656d05e8463d73ea73568cae81187c6b2e3
Author: Ildar Kamalov <ik@adguard.com>
Date:   Fri Jul 8 13:40:54 2022 +0300

    client: validate static lease ip

commit 7f4d00f9f3a54dc93ce5d5c45e9c21745f6e39d1
Merge: 2ee79626 77e5e27d
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Fri Jul 8 13:20:15 2022 +0300

    Merge branch 'master' into 4698-lease-with-gateway

commit 2ee79626a1b0c7b113dbd22ba4ef6e85ea9913ec
Merge: 471b96b8 3505ce87
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Jul 7 19:34:33 2022 +0300

    Merge branch 'master' into 4698-lease-with-gateway

commit 471b96b81da8920c1e71b7110050154f912677d2
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Jul 7 16:07:23 2022 +0300

    dhcpd: imp docs

commit 67dd6c76f7d2df4712a57281e0f40f2ee1a1efa2
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Jul 7 15:48:47 2022 +0300

    dhcpd: restrict gateway ip for lease
This commit is contained in:
Eugene Burkov 2022-07-08 15:17:47 +03:00
parent 77e5e27d75
commit a832987f7c
10 changed files with 120 additions and 42 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
CHANGELOG.md
View file

@ -32,6 +32,8 @@ and this project adheres to
### Fixed
- DHCP lease validation incorrectly letting users assign the IP address of the
gateway as the address of the lease ([#4698]).
- Updater no longer expects a hardcoded name for `AdGuardHome` executable
([#4219]).
- Inconsistent names of runtime clients from hosts files ([#4683]).
@ -44,6 +46,7 @@ and this project adheres to
[#4219]: https://github.com/AdguardTeam/AdGuardHome/issues/4219
[#4677]: https://github.com/AdguardTeam/AdGuardHome/issues/4677
[#4683]: https://github.com/AdguardTeam/AdGuardHome/issues/4683
[#4698]: https://github.com/AdguardTeam/AdGuardHome/issues/4698
[#4699]: https://github.com/AdguardTeam/AdGuardHome/issues/4699
[ddr-draft]: https://datatracker.ietf.org/doc/html/draft-ietf-add-ddr-08

1
client/src/__locales/en.json
View file

@ -47,6 +47,7 @@
"form_error_server_name": "Invalid server name",
"form_error_subnet": "Subnet \"{{cidr}}\" does not contain the IP address \"{{ip}}\"",
"form_error_positive": "Must be greater than 0",
"form_error_gateway_ip": "Lease can't have the IP address of the gateway",
"out_of_range_error": "Must be out of range \"{{start}}\"-\"{{end}}\"",
"lower_range_start_error": "Must be lower than range start",
"greater_range_start_error": "Must be greater than range start",

3
client/src/components/Settings/Dhcp/StaticLeases/Form.js
View file

@ -10,6 +10,7 @@ import {
validateMac,
validateRequiredValue,
validateIpv4InCidr,
validateIpGateway,
} from '../../../../helpers/validators';
import { FORM_NAME } from '../../../../helpers/constants';
import { toggleLeaseModal } from '../../../../actions';
@ -57,6 +58,7 @@ const Form = ({
validateRequiredValue,
validateIpv4,
validateIpv4InCidr,
validateIpGateway,
]}
/>
</div>
@ -101,6 +103,7 @@ Form.propTypes = {
ip: PropTypes.string.isRequired,
hostname: PropTypes.string.isRequired,
cidr: PropTypes.string.isRequired,
gatewayIp: PropTypes.string,
}),
pristine: PropTypes.bool.isRequired,
handleSubmit: PropTypes.func.isRequired,

3
client/src/components/Settings/Dhcp/StaticLeases/Modal.js
View file

@ -13,6 +13,7 @@ const Modal = ({
cidr,
rangeStart,
rangeEnd,
gatewayIp,
}) => {
const dispatch = useDispatch();
@ -42,6 +43,7 @@ const Modal = ({
cidr,
rangeStart,
rangeEnd,
gatewayIp,
}}
onSubmit={handleSubmit}
processingAdding={processingAdding}
@ -61,6 +63,7 @@ Modal.propTypes = {
cidr: PropTypes.string.isRequired,
rangeStart: PropTypes.string,
rangeEnd: PropTypes.string,
gatewayIp: PropTypes.string,
};
export default withTranslation()(Modal);

3
client/src/components/Settings/Dhcp/StaticLeases/index.js
View file

@ -24,6 +24,7 @@ const StaticLeases = ({
cidr,
rangeStart,
rangeEnd,
gatewayIp,
}) => {
const [t] = useTranslation();
const dispatch = useDispatch();
@ -106,6 +107,7 @@ const StaticLeases = ({
cidr={cidr}
rangeStart={rangeStart}
rangeEnd={rangeEnd}
gatewayIp={gatewayIp}
/>
</>
);
@ -119,6 +121,7 @@ StaticLeases.propTypes = {
cidr: PropTypes.string.isRequired,
rangeStart: PropTypes.string,
rangeEnd: PropTypes.string,
gatewayIp: PropTypes.string,
};
cellWrap.propTypes = {

1
client/src/components/Settings/Dhcp/index.js
View file

@ -278,6 +278,7 @@ const Dhcp = () => {
cidr={cidr}
rangeStart={dhcp?.values?.v4?.range_start}
rangeEnd={dhcp?.values?.v4?.range_end}
gatewayIp={dhcp?.values?.v4?.gateway_ip}
/>
<div className="btn-list mt-2">
<button

11
client/src/helpers/validators.js
View file

@ -339,3 +339,14 @@ export const validatePasswordLength = (value) => {
}
return undefined;
};
/**
* @param value {string}
* @returns {Function}
*/
export const validateIpGateway = (value, allValues) => {
if (value === allValues.gatewayIp) {
return i18next.t('form_error_gateway_ip');
}
return undefined;
};

1
internal/dhcpd/http.go
View file

@ -498,7 +498,6 @@ func (s *Server) handleDHCPAddStaticLease(w http.ResponseWriter, r *http.Request
}
ip4 := l.IP.To4()
if ip4 == nil {
l.IP = l.IP.To16()

12
internal/dhcpd/v4.go
View file

@ -333,12 +333,16 @@ func (s *v4Server) rmLease(lease *Lease) (err error) {
return errors.Error("lease not found")
}
// AddStaticLease adds a static lease. It is safe for concurrent use.
// AddStaticLease implements the DHCPServer interface for *v4Server. It is safe
// for concurrent use.
func (s *v4Server) AddStaticLease(l *Lease) (err error) {
defer func() { err = errors.Annotate(err, "dhcpv4: adding static lease: %w") }()
if ip4 := l.IP.To4(); ip4 == nil {
ip := l.IP.To4()
if ip == nil {
return fmt.Errorf("invalid ip %q, only ipv4 is supported", l.IP)
} else if gwIP := s.conf.GatewayIP; gwIP.Equal(ip) {
return fmt.Errorf("can't assign the gateway IP %s to the lease", gwIP)
}
l.Expiry = time.Unix(leaseExpireStatic, 0)
@ -377,7 +381,7 @@ func (s *v4Server) AddStaticLease(l *Lease) (err error) {
if err != nil {
err = fmt.Errorf(
"removing dynamic leases for %s (%s): %w",
l.IP,
ip,
l.HWAddr,
err,
)
@ -387,7 +391,7 @@ func (s *v4Server) AddStaticLease(l *Lease) (err error) {
err = s.addLease(l)
if err != nil {
err = fmt.Errorf("adding static lease for %s (%s): %w", l.IP, l.HWAddr, err)
err = fmt.Errorf("adding static lease for %s (%s): %w", ip, l.HWAddr, err)
return
}

124
internal/dhcpd/v4_test.go
View file

@ -4,6 +4,7 @@
package dhcpd
import (
"fmt"
"net"
"strings"
"testing"
@ -16,6 +17,13 @@ import (
"github.com/stretchr/testify/require"
)
var (
DefaultRangeStart = net.IP{192, 168, 10, 100}
DefaultRangeEnd = net.IP{192, 168, 10, 200}
DefaultGatewayIP = net.IP{192, 168, 10, 1}
DefaultSubnetMask = net.IP{255, 255, 255, 0}
)
func notify4(flags uint32) {
}
@ -24,10 +32,10 @@ func notify4(flags uint32) {
func defaultV4ServerConf() (conf V4ServerConf) {
return V4ServerConf{
Enabled: true,
RangeStart: net.IP{192, 168, 10, 100},
RangeEnd: net.IP{192, 168, 10, 200},
GatewayIP: net.IP{192, 168, 10, 1},
SubnetMask: net.IP{255, 255, 255, 0},
RangeStart: DefaultRangeStart,
RangeEnd: DefaultRangeEnd,
GatewayIP: DefaultGatewayIP,
SubnetMask: DefaultSubnetMask,
notify: notify4,
}
}
@ -44,44 +52,86 @@ func defaultSrv(t *testing.T) (s DHCPServer) {
return s
}
func TestV4_AddRemove_static(t *testing.T) {
func TestV4Server_AddRemove_static(t *testing.T) {
s := defaultSrv(t)
ls := s.GetLeases(LeasesStatic)
assert.Empty(t, ls)
require.Empty(t, ls)
// Add static lease.
l := &Lease{
Hostname: "static-1.local",
HWAddr: net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
IP: net.IP{192, 168, 10, 150},
testCases := []struct {
lease *Lease
name string
wantErrMsg string
}{{
lease: &Lease{
Hostname: "success.local",
HWAddr: net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
IP: net.IP{192, 168, 10, 150},
},
name: "success",
wantErrMsg: "",
}, {
lease: &Lease{
Hostname: "probably-router.local",
HWAddr: net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
IP: DefaultGatewayIP,
},
name: "with_gateway_ip",
wantErrMsg: "dhcpv4: adding static lease: " +
"can't assign the gateway IP 192.168.10.1 to the lease",
}, {
lease: &Lease{
Hostname: "ip6.local",
HWAddr: net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
IP: net.ParseIP("ffff::1"),
},
name: "ipv6",
wantErrMsg: `dhcpv4: adding static lease: ` +
`invalid ip "ffff::1", only ipv4 is supported`,
}, {
lease: &Lease{
Hostname: "bad-mac.local",
HWAddr: net.HardwareAddr{0xAA, 0xAA},
IP: net.IP{192, 168, 10, 150},
},
name: "bad_mac",
wantErrMsg: `dhcpv4: adding static lease: bad mac address "aa:aa": ` +
`bad mac address length 2, allowed: [6 8 20]`,
}, {
lease: &Lease{
Hostname: "bad-lbl-.local",
HWAddr: net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
IP: net.IP{192, 168, 10, 150},
},
name: "bad_hostname",
wantErrMsg: `dhcpv4: adding static lease: validating hostname: ` +
`bad domain name "bad-lbl-.local": ` +
`bad domain name label "bad-lbl-": bad domain name label rune '-'`,
}}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
err := s.AddStaticLease(tc.lease)
testutil.AssertErrorMsg(t, tc.wantErrMsg, err)
if tc.wantErrMsg != "" {
return
}
err = s.RemoveStaticLease(&Lease{
IP: tc.lease.IP,
HWAddr: tc.lease.HWAddr,
})
diffErrMsg := fmt.Sprintf("dhcpv4: lease for ip %s is different: %+v", tc.lease.IP, tc.lease)
testutil.AssertErrorMsg(t, diffErrMsg, err)
// Remove static lease.
err = s.RemoveStaticLease(tc.lease)
require.NoError(t, err)
})
ls = s.GetLeases(LeasesStatic)
require.Emptyf(t, ls, "after %s", tc.name)
}
err := s.AddStaticLease(l)
require.NoError(t, err)
err = s.AddStaticLease(l)
assert.Error(t, err)
ls = s.GetLeases(LeasesStatic)
require.Len(t, ls, 1)
assert.True(t, l.IP.Equal(ls[0].IP))
assert.Equal(t, l.HWAddr, ls[0].HWAddr)
assert.True(t, ls[0].IsStatic())
// Try to remove static lease.
err = s.RemoveStaticLease(&Lease{
IP: net.IP{192, 168, 10, 110},
HWAddr: net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
})
assert.Error(t, err)
// Remove static lease.
err = s.RemoveStaticLease(l)
require.NoError(t, err)
ls = s.GetLeases(LeasesStatic)
assert.Empty(t, ls)
}
func TestV4_AddReplace(t *testing.T) {